Thousands of onlookers turned out for the opening day of the Roald Dahl celebration City Of The Unexpected but many complained that they were unable to see any of the action - and some said they felt "unsafe" among the huge crowds.

Many of the performances have been taking place outside Cardiff Castle, with the scenes reminiscent of the massive crowds which turned out for the Wales team homecoming following Euro 2016.

But with so many in attendance, some elements were postponed and it led to complaints being left on the event's official Facebook page.

Onlookers said there had appeared to be issues with crowding and the flow of people moving though the city.

Due to the scaffolding on buildings on the corners of St Mary Street and Wood Street, a bottle neck occurred and people were not able to move at all.

The same issues occurred outside the castle when South Wales Police and crowd controllers had to prevent more people from entering the area outside the castle gates.

A police community support officer at the scene said: “We had some crushing issues so we had to stop people entering and create an opening that people would be able to move through to leave.”

A spokesperson for Roald Dahl's City of the Unexpected said: "It is fantastic that so many people have come out to enjoy Roald Dahl’s City of the Unexpected, which is taking place in locations all around Cardiff this afternoon.

"All necessary precautions are being taken to ensure crowd safety and we encourage people to follow us on social media for any further updates."

And despite the complaints, there was plenty of praise for the event too...